如何在SwiftUI中确定在多字文本视图中点击的字

import SwiftUI

struct ContentView: View {
    let text = "Hello, World!" // 多字文本
    
    var body: some View {
        ZStack {
            Text(text)
                .foregroundColor(.black)
                .font(.largeTitle)
                .onTapGesture {
                    let tapLocation = getTappedLocation()
                    let tappedCharacter = getTappedCharacter(location: tapLocation)
                    print("Tapped Character: \(tappedCharacter)")
                    // 在这里可以执行其他操作，例如显示弹出窗口等
                }
        }
    }
    
    // 获取点击位置
    func getTappedLocation() -> CGPoint {
        var tapLocation: CGPoint = .zero
        
        // 使用GeometryReader获取父视图的大小
        GeometryReader { geometry in
            // 获取点击位置
            let tap = TapGesture()
                .onEnded { value in
                    tapLocation = value.location
                }
            // 添加透明的TextEditor，以便捕捉点击事件
            TextEditor(text: .constant(""))
                .frame(width: geometry.size.width, height: geometry.size.height)
                .background(Color.clear)
                .gesture(tap)
        }
        
        return tapLocation
    }
    
    // 获取点击的字符
    func getTappedCharacter(location: CGPoint) -> String {
        let characterIndex = getCharacterIndex(at: location)
        let tappedCharacter = String(text[text.index(text.startIndex, offsetBy: characterIndex)])
        return tappedCharacter
    }
    
    // 根据点击位置获取字符索引
    func getCharacterIndex(at location: CGPoint) -> Int {
        var characterIndex = 0
        let attributedString = NSAttributedString(string: text, attributes: [.font: UIFont.systemFont(ofSize: 36)])
        let textStorage = NSTextStorage(attributedString: attributedString)
        let layoutManager = NSLayoutManager()
        textStorage.addLayoutManager(layoutManager)
        let textContainer = NSTextContainer(size: CGSize(width: CGFloat.greatestFiniteMagnitude, height: .greatestFiniteMagnitude))
        textContainer.lineFragmentPadding = 0
        layoutManager.addTextContainer(textContainer)
        
        let textBoundingBox = layoutManager.usedRect(for: textContainer)
        let textContainerOffset = CGPoint(x: (UIScreen.main.bounds.width - textBoundingBox.size.width) / 2 - textBoundingBox.origin.x,
                                          y: (UIScreen.main.bounds.height - textBoundingBox.size.height) / 2 - textBoundingBox.origin.y)
        let locationInTextContainer = CGPoint(x: location.x - textContainerOffset.x, y: location.y - textContainerOffset.y)
        
        characterIndex = layoutManager.characterIndex(for: locationInTextContainer, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
        
        return characterIndex
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}